18.5 and SB-N5 underexposing?

A a week ago or so I posted that I thought my SB-N5 was faulty as I tried the flash with my new 18.5 and got underexposure and I thought the same was happening with other lenses. Well tonight I decided to take a few shots with the 10-30 and the 18.5 at the same aperture and close as I could to the same focal length and the 18.5 is definitely underexposing with the SB-N5 compared to the 10-30. I also shot a scene with both lenses without the flash and exposure was correct for both. I think there needs to be a firmware fix for this or my flash is indeed faulty. Anyone else care to try this test? Below are samples.